qbank_statistics\helper Class Reference

Static Public Member Functions
static	calculate_average_question_discrimination_index (int $questionid)
	Calculate average discriminative efficiency.
static	calculate_average_question_discriminative_efficiency (int $questionid)
	Calculate average discriminative efficiency.
static	calculate_average_question_facility (int $questionid)
	Calculate average facility index.
static	format_discrimination_index (?float $value)
	Format discrimination index (Needs checking?).
static	format_percentage (?float $number, bool $fraction=true, int $decimals=2)
	Format a number to a localised percentage with specified decimal points.

Member Function Documentation

calculate_average_question_discrimination_index()

static qbank_statistics\helper::calculate_average_question_discrimination_index ( int $questionid )

static

Calculate average discriminative efficiency.

Parameters

int

$questionid

question id

Return values

float|null

calculate_average_question_discriminative_efficiency()

static qbank_statistics\helper::calculate_average_question_discriminative_efficiency ( int $questionid )

static

Calculate average discriminative efficiency.

Parameters

int

$questionid

question id

Return values

float|null

calculate_average_question_facility()

static qbank_statistics\helper::calculate_average_question_facility ( int $questionid )

static

Calculate average facility index.

Parameters

int

$questionid

Return values

float|null

format_discrimination_index()

static qbank_statistics\helper::format_discrimination_index ( ?float $value )

static

Format discrimination index (Needs checking?).

Parameters

float | null

$value

stats value

Return values

array

format_percentage()

static qbank_statistics\helper::format_percentage ( ?float $number, bool $fraction = true, int $decimals = 2 )

static

Format a number to a localised percentage with specified decimal points.

Parameters

float | null	$number	The number being formatted
bool	$fraction	An indicator for whether the number is a fraction or is already multiplied by 100
int	$decimals	Sets the number of decimal points

Return values

string

Exceptions

coding_exception

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The documentation for this class was generated from the following file:

• question/bank/statistics/classes/helper.php